Theodore L. Diamond, a resident of Lily Pond Lane in East Hampton since 1980, died at home in New York City on Feb. 22 at the age of 95, two weeks after celebrating 66 years of marriage to Claire Winston Diamond, who survives.
Mr. Diamond founded T.L. Diamond and Company, an international metal trading company with zinc smelters in West Virginia and Illinois, after learning the metal trade from his father’s business. He was a competitive long-distance runner, who entered some 15 New York Marathons and had a personal best time of 4:01.
Born in New York City in 1916 to Walter and Jeanette Luria Diamond, Mr. Diamond earned a bachelor’s degree from Lehigh University in 1937 and a master’s in business administration from Harvard in 1939.
Mr. Diamond’s family said he led a full and varied life, approaching everything he did with enthusiasm and determination. He began running in the 1960s at the age of 50, and continued through his 80s. “Marathon Day” was said to be a special time for the family to gather and celebrate. He was often seen training for races in East Hampton, doing 10-mile runs along Lily Pond Lane and through the town on Montauk Highway. He had participated in many holiday weekend races on the South Fork, which he often won in his age group. Mr. Diamond was also a member of the Noyac Golf Club.
Appreciative of his education, Mr. Diamond became an active alumnus. He had endowed the Theodore L. Diamond Chair in Engineering and Applied Science, the Diamond Theater at Lehigh’s Zoellner Arts Center, and the Theodore L. Diamond Center for Economic Education and Entrepreneurship in the College of Business and Economics.
He had served on the Lehigh board of trustees for 15 years, from 1981 to 1996, and was a trustee emeritus until his death. He had received two of Lehigh’s highest alumni honors, the Alumni Award in 1977 and the L-in-Life Award in 1980, and was given an honorary degree in 1985. He also was the 1939 class agent of Harvard Business School.
In addition to his wife, Mr. Diamond is survived by two children, Peter Diamond and Trish Diamond, both of New York City, and by three grandchildren. No services were held.